Improvement in telegraph-apparatus



B. MEYER.

Telegraph Apparatus.

No. 101,900. Patented April 12, 1870.

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Letters latcutNo. 101,900, dated April 12, 1870.

IMPROVEDIENT IN TELEGRAPH-APPARATUS.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern.

Be it known that I, BERNARD MEYER, of the city of Paris, in the Empire of France, have invented a. new and improved Telegraph Apparatus; and I do hereby declare the following to be a full, clear, and

exact description thereof, which will enable those skilled in the art to make and use the same, reference being bad to the accompanying drawing forming part of this specification, in which drawing- Figure 1 is a plan or top view of the whole apparatus.

Figure 2 is -a side elevation of the same, showing the receiving mechanism. I

Similar letters indicate corresponding parts.

This invention relates to certain improvements in telegraphic apparatus for transmitting fac-st'mile copies of writings and drawings by means of electric currents, without having recourse to the chemical means in use up to the present time.

My invention consists in a revolving spiral blade combined with the message holding cylinder and tracer.

It further consists in the combination of a straight electro-magnet, the permanent magnet-paper supporting lever, and the spiral blade, the uses and opera tion of which will be hereinafter more fully described,

There are, consequently, three diifercnt parts to consider in this apparatus-the transmitting, the receiving, and the synchronical movement; but I shall not enter into a detailed description of those parts already well known, such as the means of connecting the scvral parts of my apparatus with the telegraphic wires,

with the clock-work movement, &c.

TransmittingAmer-ates.

Every telegram to be transmitted is, in the first place, writteuupon a metallic sheet of paper by the person sending the telegram, or by an employ. The ink must be isolated. The proportions of the said metallic sheet depend on those of the transmittingcylinder, the width of the sheet being equal to the circumference of saidcylinder, while its length may be varied, though it cannot be taken any longer than the cylinder.

Having thus written the telegram, it is wrapped around the transmitting cylinder A, being secured by some adhesive substance, said cylinder revolving by means of the clock-work movement. The circumference of said cylinder should be equal to the pitch of the spiral blade, which will be hereafter described. Its length is variable. It can be removed and reinserted as desired during the working of the appara tus, and without interfering therewith. It revolves under a style or tracer, secured at B from the end of the traveler G, this latter being provided with a nut placed at D, and carried along by a screw, E, from right to left, said screw revolving by means of the clock movement. This movement of the traveler is about one-eightieth part of an inch (one-third of a millimeter) for every revolution of the transmittingcylinder. The tracer consequently describes, in its course on the surface of the cylinder, 3. helicoidal line of indefinite length, in such a way thatall the surface of the metallic sheet of paper on which the telegram is written passes under the style. There is Receiving Apparatus.

For the reception ordinary white paper is used, rolled at F. It passes under the lever H G and around said lever, whose upper edge H should be slightly blunted. over this edge.

The taking up of the paper is effected continuously by the cylinders I and J. The width of the white paper, as in the original telegram, should be equal to the circumference of the transmitting-cylinder A.

A straight electro-magnet, K, is fixed to the lever G H, and opposite to the poles of this electro-magnet, when the same is in the circuit, are the corresponding poles of a permanent magnet, L. This electro-magnet serves as an armature for the permanent magnet. It is in contact when at rest.

Above the edge H of the lever G H passes a spiral blade, M N, attached or cast on a cylinder, H, revolving by means of the clock-work. Each revolution of the spiral corresponds to one revolution of the transmitting-cylinder, and only presents at each revolution one point of the plain surface of the edge H of the lever G H, against which it bears when the-circuit is broken.

An inked roller, 0, turning freely upon the spiral, moistens the edge of said spiral continually, and this edge, by its contact with the paper, impresses thereon transversal lines in ink. This impression continues as long as the circuit is broken.

At every revolution which the spiral makes, it traces a transversal line equal to the circumference of the transmittiug-cylinder A, but if the circuit is not broken, the poles of the electro-Inagnet are repelled by the corresponding poles of the permanent magnet, the contact ceases. It recommences with the interruption of the circuit, and so forth.

It will be understood that by these means a series The paper ought to pass closely of dots and strokes is produced, which being placed synchronically after one another, reproduce the whole of the writing or drawing which has been traced on the original telegram attached to the transmitting cylinder A.

The Synchronism.

The movement of this apparatus is regulated by the pendulum 1, hung in a fixed or rigid manner from an upright, Q, by an elastic metal rod, It, whose vibrations are isochronical.

Another smaller ball, S, placed over the ball P of the pendulum, slides up and down on the same rod, and is suspended from a cord attached to the top of the upright at T, in such a way that it can be lowered or raised as required. This little ball answers the double purpose of correcting, by its being raised or lowered, any defects in the synchronism which may arise in the current of transmission, and of producing ters Patent, is-

1. The revolving spiral blade, in combination with the message-holding cylinder and tracer, substantially as and for the purpose described.

2. The combination of the straight electro-magnet, the permanent magnet, the paper-supporting lever, and the spiral blade, substantially as and for the pur: pose described.

, MEYER.

Witnesses:

J. U. ZUST, F. BONNEVILLE, F. OLOOTT. 

